SCH-28 Differential Pressure Switch

Brand: KOBOLD Instruments, Inc.

These Differential pressure switches are IP65, and suitable for a variety of applications such as: food industry, cannery, petrochemical, conventional and nuclear power station where it is required to control differential pressure, level, flow.

The sensing element is a metallic diaphragm with two metallic bellows and acts directly on the microswitch through a self-centering pivot.

The simplicity of the design, without levers, cams or similar mechanism, gives the unit an exceptionally long working life.

Specifications

Adjustment Type

  • Internal, Micrometric Adjustable

Ambient Temperature Range

  • -25° to 65° C (-13° to 149° F)

Applications

  • Conventional & Nuclear Power Station
  • Food Industry
  • Petrochemical Plants
  • Pharmaceutical

Approvals & Certifications

  • IEC - 529

BSP Connection

  • G 1/2" Male

Cover Material

  • 304 Stainless Steel
  • Bayonet Lock

Diaphragm Material

  • AISI 316 Stainless Steel

Differential Pressure

  • Fixed, Adjustable from 10 % to 50 % of Setting Range

Electrical Connectors

  • Terminal Strip

Electrical Contacts

  • 1 Internal & 1 External

Electrical Rating

  • 0.1 A at 24 Vdc Resistive Load
  • 1 A at 125 Vac Resistive Load
  • 15 A at 125 Vac Resistive Load
  • 15 A at 250 Vac Resistive Load
  • 20 A at 125 Vac Resistive Load
  • 20 A at 250 Vac Resistive Load
  • 6 A at 24 Vdc Resistive Load

Environmental Protection

  • IP65

Gasket Material

  • PTFE

Materials of Construction

  • 321 Stainless Steel - Bellows
  • AISI 304 Stainless Steel - Tag

NPT Connection

  • 1/2" NPT Female
  • 1/2" NPT Male
  • 1/4" NPT Female

Plug Material

  • AISI 316 Stainless Steel

Pressure Range

  • psi: 0 to 145.038 (kPa: 0 to 1000, bar 0 to 10)

Process Connection Material

  • AISI 316 Stainless Steel

Process Temperature

  • 100° C (212° F) - Maximum

Repeatability

  • ≤ 1 % - Full Setting Value

Set Point - Decreasing

  • bar: 0 to 10
  • kPa: 0 to 1,000
  • psi: 0 to 145

Set Point - Increasing

  • bar: 0 to 10
  • kPa: 0 to 1,000
  • psi: 0 to 145

Switch Type

  • 1 to 2 SPDT Microswitches

Temperature Range

  • 100° C (212° F) - Maximum

Thermal Drift

  • ≤ 0.05 %/°C (≤ 0.027 %/°F)

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